feat: 添加视频服务器双机热备状态

src/utils/http-client.ts

@@ -136,6 +136,17 @@ export const unwrapResponse = <T>(resp: HttpResponse<T>) => {
   return data;
 };
 
+export const unwrapNullableResponse = <T>(resp: HttpResponse<T>) => {
+  const [err, data, result] = resp;
+  if (err) throw err;
+  if (result) {
+    const { isSuccess, path, msg, errorMsg } = result;
+    if (!isSuccess) throw new Error(`${path ? `${path}: ` : ''}${msg || errorMsg || '请求失败'}`);
+  }
+  if (data === undefined) throw new Error('响应数据不存在');
+  return data;
+};
+
 // 针对没有数据的响应，直接判断是否存在错误
 export const unwrapVoidResponse = (resp: HttpResponse<void>) => {
   const [err, , result] = resp;